/* 屏幕小于1400px,大于1200px */
@media screen and (min-width: 1200px) and (max-width:1400px) {
  body {
    --font-size: 14px;
  }

  .item {
    width: calc((100% - 5px*3) / 3);
    min-width: calc((100% - 5px*3) / 3);
    max-width: calc((100% - 5px*3) / 3);
    margin: 0 5px 10px 0px !important;
  }

  #nav div,
  #showNav {
    width: calc(100% / 8);
  }

  #nav {
    display: flex !important;
  }

  #showNav {
    display: none !important;
  }
}

/* 屏幕小于1200px,大于900px */
@media screen and (min-width: 900px) and (max-width:1200px) {
  body {
    --font-size: 12px;
  }

  .item {
    width: calc((100% - 5px*2) / 2);
    min-width: calc((100% - 5px*2) / 2);
    max-width: calc((100% - 5px*2) / 2);
    margin: 0 5px 10px 0px !important;
  }

  #nav div,
  #showNav {
    width: calc(100% / 8);
  }

  #nav {
    display: flex !important;
  }

  #showNav {
    display: none !important;
  }
}